AERONAUTICS: Fighting Noise

To pilots, passengers, increasingly to groundlings, is airplane noise a
plague.

To military airmen it is a serious limitation on operations, an absolute
barrier to surprise maneuvers. Uncounted attempts have been made to
silence the roaring enginesthe latest last week at Roosevelt Field,
L. I. by a Miss El Dorado Jones, of Manhattan, formerly of Moline, Ill.

Puffing upon one cigaret after another, Miss Jones directed mechanics in
attaching to the Cirrus engine of a Moth biplane a muffler of her own
invention. As the plane sped along the runway and over the hangars...